One problem related to engine head gasket leaking has been reported for the 1999 Mercury Cougar. The most recently reported issues are listed below.
3/21/05 vehicle taken to Lincoln Mercury driveability concern by>>( my wife)>>>check engine light on, they fond intake gaskets leaking vac & bank 2 also monitor are very active need tune up and plug wires and tires. . . My wife gave them all technical service bulletins diagnostic trouble codes po420 & po430 paper. . . . Also,told them 99-Mercury Cougar 2. 5l engine stall and have inability to start car. . . They kept paper, and told her she need new battery cables!!!! call manufacturer on TSB and recall, we was told there was no recall on our vehicle I. D. Number. . . . Etc. . . . . . . . Consumer reports used car buying guide fond recall ---99-00 Mercury Cougar with 2. 5l v6 engine----natsa number #01i009000 please help. . . . . . . . . . . . .